MILLSTAND ROLLS

  • National Supply represents a number of Mill Stand roll suppliers.  We can supply a wide range of rolls, from Forged to Static and Spin cast.  Grade types range from Indefinite chilled, EN-ICDP, Steel and graphitic steel, High Chromium cast iron, HSS, High Chromium steel and ½ HSS.  Our suppliers will utilize the proper mix of carbon and alloy elements in the production of Back-up Rolls and Hot working Rolls for both flat and shaped products to achieve the required mix of different properties, such as hardenability, hardness, toughness, fatigue and thermal cracking resistance.  All machining steps are performed by using modern Numerical Control Lathes.  Each of our roll manufacturing facilities has the expertise, equipment and experience to meet the most demanding rolling mill applications.  Our suppliers service many OEM’s and mills across the globe. 
  • ISO 9001 Certified

5 induction furnaces : 1 x 4.5 tons, 1 x 5 tons, 2 x 23 tons and 1 x 33 tons.

  • 1 vertical spin casting machine (fully automated) Maximum speed : 600 rotations per minute Finish products dimensions : diameter from 575 to 1 250 mm Maximum length of the roll barrel : 4 meters 
  • 10 heat treatment furnaces (all computer-controlled) 
  • 1 sand mixer of 25 tons per hour capacity 
  • 1 blasting machine 
  • Rolls dimensions : Maximum length : 7,500 mm. Barrel diameter : 575 to 1,250 mm. Weight range : between 5 and 30 tons. 
  • Grade type: Indefinite chilled. Steel and graphitic steel. High Chromium cast iron. HSS and ½ HSS. High Chromium ste

  • Trumpets -used when manufacturing bottom pouring steel ingots.
  • Slag Pots – manufactured in lamellar or nodular cast iron.
  • Ingot moulds and base plates -produce high quality steel ingot moulds thanks to more than 20 years of experience
  • Dryer rolls – hollow rolls are used in many industries such as : Paper industry, Food industry, Rubber industry and Plastic industry
  • Shells – cast iron moulds used for roll production
  • Staves coolers – utilized on blast furnace cooling system

Strict quality control checks are adhered to throughout entire process: •

  • Molding: Sand characteristics, raw materials and mould lining controls.
  • Melting: Temperature, weight, chemical analysis and thermal analysis.
  • Casting: Spin casting machine speed, temperatures, weight and filling rate
  • Heat treatment : Temperatures, hardness and structure controls.
  • Internal quality : Bonding, thickness and core health controls.
  • Metal structure : Barrel, core and bonding quality controls.
  • Hardness : Core and barrel hardness controls.
  • Geometric control: drawing review

SdF is a fully integrated Division, equipped with the  ‘state of the art’ technologies in: 

  • Steelmaking/Ingot Pouring
  • Heating for forging
  • Forging
  • Machining
  • Heat Treatment
  • Final Machining
  • Destructive and Non-Destructive testing
  • Arcelor Mittal
  • Danieli
  • Saltzgitter
  • SMS-Siemag
  • SSAB
  • Voest Alpine
  • AK Steel
  • Jindal
  • Outokumpu
  • Posco
  • TATA
  • Nucor Steel
  • Severstal
  • Steel Dynamics
  • Thyssen Krupp.
  • Essar Steel.
  • JSW Steel Ltd.
  • Bhushan Steel Ltd.
  • CSN (Brazil)
  • Ispat Inland (USA) 
  • Voest Alpine